Diagnostic trouble code (DTC) information

Condition 

The automatic transmission control module (TCM) receives a signal from the pressure switch for lock-up PS4 to check the lock-up valve position. Diagnostic trouble code (DTC) TCM-0053 is stored if the lock-up solenoid has stuck in the open position.

Substitute Value 

• The control module (TCM) "Emergency mode II" program has been initiated.

Possible Source 

• The pressure switch for lock-up is jammed
• Contact resistance in the terminals
• The transmission oil level is too high
• Mechanical fault in the transmission control system
• There is an electrical fault in the pressure sensor circuit.

Fault symptom[s] 

• General orange warning lamp lit
• No lock-up function
• Harsh gear shifting.

HINT: Harsh gear shifting can be caused by: 

• no reduction of line pressure when shifting
• no reduction of line pressure when moving the gear selector between positions P-R, N-R and N-D
• no torque limiting request to the engine control module (ECM) when shifting.